GamePro hands-on with Metal Gear Solid 4: "It's spectacular"

[MikeB]

Though snake is skinned in medieval clothes I think this Gametrailers video shows off the gameplay well (including realtime interactive cut-scenes):

http://www.gametrailers.com/player/32472.html

Some dev walkthroughs are pretty interesting as well. If you want you can play the game as a FPS.